Malicious PDF — malware analysis report

Static analysis result for SHA-256 80051399f8d8f925…

MALICIOUS

PDF

47.0 KB Created: 2020-10-09 12:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9a49f6d7155bdbe006a931bb52489e59 SHA-1: aee40621daf70d3a4941eaa8ee781307b62044e0 SHA-256: 80051399f8d8f925c96eafdfb0592747aa1021fa2fcca95e8c0a223448490791
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various platforms, which is indicative of a link farm or SEO poisoning tactic. One of the primary links, 'https://ggtraff.ru/strik?keyword=gerber+viper+toilet+vp-28-590', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/strik?keyword=gerber+viper+toilet+vp-28-590 In PDF document text
    • https://site-1036991.mozfiles.com/files/1036991/xoxejekawasenarubiwow.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/vegodan.pdfIn PDF document text
    • https://site-1042780.mozfiles.com/files/1042780/31908448446.pdfIn PDF document text
    • http://files.georgeskisscollection.com/uploads/1/3/1/4/131454521/4569512.pdfIn PDF document text
    • http://files.artesiatrack.com/uploads/1/3/0/7/130776712/tagobiza_vatixe_vilezetonu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4259/7795/files/59683280702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/84007649832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8742/0835/files/fahrenheit_451_socratic_seminar_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8914/2968/files/toomics_vip_account_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0651/0247/files/52526239747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b2ab33-2a2f-4113-816c-1d7988d7f4e4/luxavogixowomojuvexevuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a473ab-523e-4616-9dfc-15f1daaa5fa8/mimajejatobevowabulinuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d68abc-c77a-4480-a3e1-47ae4d9fad95/92022642290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d538985f-4f61-47fb-b3a9-1d08f7be0c35/xutizotegavaz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5137 5436 bytes
SHA-256: 14f0f1ee306c45337345d1b60f64d3c3183c08ba0037e1615032fc4858c8c384
font_01_sfnt_off000063ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 3612 bytes
SHA-256: 8e5386d0c63303969a7fd8a3c57cd3a0b64482b7a5fce91c12d5ff4cc20ef16e
font_02_sfnt_off0000723e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723E 10592 bytes
SHA-256: a8dd7ac8eac19486f96e79f4d85a670f7d9a2d68bce0d0702b38077df7407652
font_03_sfnt_off000096cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CF 16404 bytes
SHA-256: 6608f95346cd29c590c8b5a9cc60f3eb8a62a5101307037ec78468174a7740e3

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